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  1. Best bang for the buck performance mod

    When have I said no to a jb4 , I even asked if bm3 or jb4 is better

  2. Best bang for the buck performance mod

    an actual tune is always better. However if your ecu is locked then you have to send it to Finland and it will be a lot more expensive than a JB4.

  3. Best bang for the buck performance mod

    Which would be better a jb4 or bm3 for street use, I’m looking for acceleration/torque

  4. 2.0 JB4 or Femto+Bm3 route?

    I'm looking to get a little bit more out of my b48. Looking to upgrade it further down the road with DP and some other bolt on mods. Femto+bm3 is around 1200€for me while jb4 is 500€ish. should i go for the unlock and bm3 despite the higher cost?

  5. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    What kind of power is a 2020 making on BM3/MHD on ~E20? Can't imagine its much more than 425. Guess the real benefit would be the ability to run up to E50 instead.

  6. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    Either one works for JB4 as far as I can tell from the website, though it looks like CANbus is what is used for MHD or BM3 if you ever end up going a flextune with those down the line.

  7. Anyone mess around with 60-130 times?

    Many who capture these numbers, don't willingly post them. Here's mine from last season, hoping to chop off another second.

  8. Anyone mess around with 60-130 times?

    E50 vs E70 is not a big difference. My guess is the pure turbo supra you're talking about is on a stock trans and conservative tune. DA also plays a note. Either way, i'm heading deeper into 7s with port, a tire and a custom map. Maybe even top 6s. Most 60-130 dragy slips I've seen on this...

  9. Manual Tuning Options

    As far as options I'd say most people w/ a manual trans either go with a JB4, BM3, or MHD. There is JB+ and MG Flasher, but you don't see many people using those. I'm a bit bias and would recommend MHD since they currently have more capability w/ the Motiv Reflex integration than BM3. Whatever...

  10. Boost leak?/bad turbo?

    Well that sucks, I’ve seen plenty of people run the JB4 on map 2 with zero issues, tomorrow I plan to take my car to a shop and see if my turbo really is done. Not saying you’re not wrong or anything. Took a picture of inside and not sure of any damage is done.

  11. Boost leak?/bad turbo?

    your turbo is gone, had the same exact sound last week. chipped propeler and shaft play vertically and horizontally, stop driving your car before you do more damage, i think oem turbo is less than 800 bucks or you can go big turbo like i did, bm3 OTS and jb4 definitely kills oem turbos, 50+...

  12. Tune on only 91 gas question. Big turbo?

    Nevada.........4500' elevation. Bro are you in the Reno/Tahoe area? That's where I'm at. :) Anyways, if you are, you can buy cans of E85 from Low Boost Performance. I've been running the JB4 for about two years now with a custom tune from Jesse and on 91 with an AA catted downpipe I dyno'd...

  13. Sold: For Sale: JB4 $450 OBO

    Hello. I’ve got my JB4 up for sale. It has both the Bluetooth connect kit and also the EWG connector. I’ve had it for years and it’s worked flawlessly. I recently tuned the car on BM3 so I don’t need it anymore. I’ve also unlocked it from my account so it should be good to go for the buyer...

  14. Downpipe, catback & intake question

    I had the exact same question but now I don’t have to look stupid asking it so thanks ?! I applaud your courage. about to install the MST 6in catted DP, with Magnaflow and I have the HKS air box already installed. Much thanks

  15. Sold: FS: JB4 w/ EWG and Bluetooth

    Selling my JB4 unit off of my 2022 AT. Used for about a year and less than 3k miles, running custom Jesse map 6. Worked flawlessly. Reason for selling - going BM3. $475 shipped CONUS

  16. Downpipe, catback & intake question

    Sorry if this is stupid but I'm new to modifying cars so just wanna make sure I don't mess anything up. I have a '23 MT and I want to install a downpipe, catback and an intake I want to know if I can just install these without a tune or CEL, since I don't want to ship my DME overseas and I have...

  17. I just bought a supra from iaai. How do I know if my ecu has a tune?

    Yes

  18. I just bought a supra from iaai. How do I know if my ecu has a tune?

    Can jb4 used together with ecutek, mhd, bm3. Sorry for the question, I am new in this topic

  19. I just bought a supra from iaai. How do I know if my ecu has a tune?

    Can jb4 used together with ecutek, mhd, bm3. Sorry for the question, I am new in this topic.

  20. What did you do to your Supra today?

    3 years later. Ditched JB4. On BM3 now.





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